Really?? My parents' house in Toronto has had 200 amps for, well, ages. I've heard, from an electrician friend, of posh houses being set up with 400 amps (!).
with what voltage? because 200 amp with 120v it's not different than 240v with 100 amp
In Canada, the residential mains voltage is 120V. So it is not different from UK 240V with 100 amp.
Yes, that's right - but as I indicated, the power folks will let you upgrade to 400 amps if you really really want to.
(Funny: my dad once told me that 200 amps used to be the smallest offering for light industrial...)